Check if Days_supply is the same as datediff(drug_exp_start_date,drug_exp_end_date)
Source:R/checkDaysSupply.R
      checkDaysSupply.RdCheck if Days_supply is the same as datediff(drug_exp_start_date,drug_exp_end_date)
Usage
checkDaysSupply(
  cdm,
  drugRecordsTable = "ingredient_drug_records",
  byConcept = TRUE,
  sampleSize = 10000
)